Atlanta-based Delta, which has nearly 690,000 followers on Twitter, said that it is reviewing its procedures "to ensure that future images and posts reflect both our values and our global focus." A spokeswoman said that no one had gotten in trouble for the tweet.

According to its website, Delta flies to Accra, Ghana, from Kennedy Airport in New York.

Delta is not the first company to stumble on social media.

In April, US Airways apologized after accidentally tweeting a picture of a naked woman to a customer who had complained about a delayed flight. The employee was not punished for what a spokesman called an honest mistake. Chrysler, Home Depot and others have also apologized after tweets that drew criticism.